TeX, LaTeX and Friends

bp2017

2:26 AM

Why won't this work?
\fp_to_dim:n{\fontdimen2\font}
! Missing number, treated as zero.

Although following works:
\dim_const:Nn\whatever{\fontdimen2\font}

Poline Sandra

4:30 AM

@AlanMunn thank you do you know please how to change the numerotation of chapters and sections from Indian to Arabic under Babel?

Alan Munn

@PolineSandra No, sorry not off hand. I think for Arabic you would be better off using XeLaTeX instead of pdfLaTeX and polyglossia instead of babel.

Poline Sandra

the problem is that I finish the reduction and I just have 1 week

Alan Munn

@PolineSandra Ok, so not a good time to change. What I suggest is asking a question on the main site. You should include a tiny example document that is compilable, and shows the problem you're trying to solve. In this case the document you put in the question should look like this:

\documentclass{book}% or the actual class you are using
\usepackage[english,arabic]{babel}% if this is how you are loading babel
... any babel related stuff % commands that rename stuff
... some font stuff % I assume you need to load an Arabic font
...any package you are using to modify sections/chapters
\begin{document}
\chapter{A chapter}
\section{A section}
\end{document}

The example shouldn't have any other packages that you are using since they are unlikely be necessary to solve the problem.

@PolineSandra There are quite a few users who work in Arabic and know much more about this than I do.

Poline Sandra

4:51 AM

I ask the question

Alan Munn

@PolineSandra Your example isn't quite minimal. And it doesn't compile for me because I don't have the arqam package (which means it's not part of TeX Live). Is that necessary for the example to work? If not, take it out (along with most of your other unneeded packages (tables, math etc.))

Poline Sandra

I delete some packages

Alan Munn

5:07 AM

@PolineSandra So you want the 1 in the chapter to be spelled out in Arabic, and the 1.1 in section to be in western numerals? It would be helpful to explain that a bit more clearly.

Poline Sandra

instead of

الفصل ١

i want if possible

الفصل الاول

and thé section

1.1 instead of ١.١

I added these information

Alan Munn

@PolineSandra Right, but for someone who doesn't know arabic, this distinction isn't too obvious.

Poline Sandra

5:28 AM

how to say then?

Alan Munn

@PolineSandra Here's a solution to your chapter problem:

\makeatletter
\newcommand{\arabic@words}[1]{% substitute the relevant Arabic numbers here
\ifcase#1\or One\or Two\or Three\or Four\or Five \or Six\else\@ctrett\fi}
\newcommand*\arabicwords[1]{\expandafter\arabic@words\csname c@#1\endcsname}
\renewcommand\thechapter{\arabicwords{chapter}}
\makeatother

In the code above, where I have One Two Three etc. replace that with the appropriate Arabic word. You'll need to add as many as you have chapters. This code is adapted from my answer here.

Poline Sandra

5:41 AM

yes it works but it make a little problem is the table of contents

Alan Munn

@PolineSandra I think I'm getting out of my depth to help you this way. (It's also almost 02h here.) But you need to be much more specific in explaining problems. Ask another question about that, showing what you're doing.

Poline Sandra

6:26 AM

we can sent an image here?

Alan Munn

@PolineSandra Yes, but please don't use the chat this way (if that's what you mean by 'here') Your problems are too complex to be solved in chat. Use the main site and ask questions there.

@PolineSandra Good night.

David Carlisle

6:48 AM

@bp2017 well \fontdimen2\font is a tex primitive dimension so you should expect \dim_anything to work, it's not an expl3 floating point number so ....

Poline Sandra

tex.stackexchange.com/questions/494419/… this my question with all details please someone help me

Lacey

10:27 AM

is anyone here familiar with the evince options?

Application Options:
-p, --page-label=PAGE The page label of the document to display.
-i, --page-index=NUMBER The page number of the document to display.
-n, --named-dest=DEST Named destination to display.

-p and -i seem to be the same thing

i couldnt get -n to take me to a section name

ok named-dest is done with the hyperref package

tex.stackexchange.com/questions/246705/pdf-page-labels hyperref does it all, heh

what pdf reader does everyone use?

David Carlisle

10:54 AM

@Lacey xpdf or acrobat if reading from the filesystem, the pdf rendering of the browser if pdf coming from a url (so usually firefox or chrome)

Joseph Wright

@Lacey Adobe Reader: it's the reference system (or in my editor the built-in quick viwer)

Ulrike Fischer

@Lacey sumatra, adobe reader, adobe pro, sometimes browser plug-ins.

yo'

@Lacey Acrobat Reader, TeXworks internal, and google app on the phone

Lacey

11:36 AM

@JosephWright what is your editor?

thanks for the responses, everyone. im surprised adobe is still so common, and no one uses evince.

user280247

Is this code wrong?

user280247

\documentclass{report}
\begin{document}
\begin{tabular}{cccc}
\multicolumn{3}{ccc}{Functions} & Ratio \\ \hline
1& 2& 3& 4\\
\end{tabular}
\end{document}

user280247

No file latex.aux.
! Missing \endgroup inserted.

Phelype Oleinik

@santimirandarp \multicolumn{3}{c}{Functions}

AlexG

@Lacey Evince has improved a lot, lately. But still, from all viewers AR comes with the richest feature set.

user280247

11:42 AM

@PhelypeOleinik Oh, I'm sorry. Thanks

Phelype Oleinik

@santimirandarp No problem. You're welcome :-)

egreg

12:04 PM

@santimirandarp The second argument to \multicolumn should contain a single column specifier (with possible addition of @{...} or | on either side).

user280247

12:24 PM

yes, thanks @egreg I think you're clarifying cause you see it reasonable?

user280247

Oh, yes, it is reasonable...thanks for the remark

David Carlisle

12:36 PM

@egreg we could probably make the multicolumn code give a sensible error message if it is about to add a & ... (at least the array package version)

user280247

2:05 PM

guys, just reading a book find the differential written as $d\,t$

user280247

How would you write the differentials dt, d\,t or what?

Harald Hanche-Olsen

@santimirandarp \mathop{}\!dt ;-)

@santimirandarp But I hide that implementation detail in a macro.

David Carlisle

youtube videos of interest to some at least... nickhigham.wordpress.com/2019/06/05/the-argonne-tapes

Harald Hanche-Olsen

2:23 PM

@santimirandarp But d\,t is just plain weird. It's as if the author read some advice on spacing of differentials but misunderstood. Or perhaps using \mathop{d}t? That produces the right spacing before the d, but adds a misplaced space after it.

user280247

@HaraldHanche-Olsen thanks

Moriambar

2:52 PM

hello

mickep

3:18 PM

This article might interest people.

2

Paulo Cereda

@Moriambar ciao! Long time no see!

Joseph Wright

3:38 PM

@mickep It's good, but I do wonder about Overleaf feeling the need to explore the TeX source code here: it's educational but feels much more suited to TUGboat (@barbarabeeton)

David Carlisle

@JosephWright I was just thinking the same, why discuss the numeric encoding of tokens in a series claiming to be about \expandafter also they don't describe \expanded you will be disapointed to know:-)

Alan Munn

Do we have any regular Russian users in chat? (Apart from @DavidCarlisle of course.)

David Carlisle

@AlanMunn так грубо

Alan Munn

@DavidCarlisle Я не сомневаюсь, что твой русский безупречен.

bp2017

3:57 PM

@DavidCarlisle, thank you. I did \fp_to_dim:n{\dim_eval:n{\fontdimen2\font}*2}.

David Carlisle

@bp2017 I must be missing somthing, why do you need fp_to_dim here?

@AlanMunn наконец-то мы договорились

@bp2017 @JosephWright and the rest of the team were discussing recently the need to allow some dimension expressions in fp expressions, but here you have a dimension and seem to want a dimension so why go via fp?

bp2017

4:30 PM

@DavidCarlisle, (1) integer "2" can be replaced with any floating point number (not sure this can be done with regular dims), (2) fp's "floor" function (or any calculation-related functionality of fp) can be used in the expression.

@DavidCarlisle, besides, when I do calculations on dims, they tend to have decimals with more than 5 or 6 digits (which is standard for TeX dims, I suppose) so I "trim" them by converting to dim values (with \dim_eval or \dim_set).

@DavidCarlisle, I "trim" them right away to more easily see what the actual dim will look like eventually.

marmot

@santimirandarp IMHO the differential d's need to be upright, and no space between d and t.

Ulrike Fischer

@bp2017 why not \fp_to_dim:n{\dim_to_fp:n{\fontdimen2\font}*2}?

David Carlisle

4:53 PM

@bp2017 no, dim_eval and dim_set are dim values, they are essentially \setlength but OK I suppose, it's just that if you compare \fp_to_dim:n{\dim_eval:n{\fontdimen2\font}*2 and 2\dimexpr\fontdimen2\font\relax with \tracingall you will see a scary amount of code go past that isn't doing anything:-)

bp2017

5:56 PM

@UlrikeFischer, good point (now that I think of it).

@DavidCarlisle, I did \tracingall and my laptop exploded: TeXworks windows still hanging, but by the looks of the log size it'll take time to pinpoint the difference between those two expressions (at least for me).

The log size is 1.6 MB (that's a lot of text).

Phelype Oleinik

@bp2017 You can probably reduce it a tad by loading the trace package and using \traceon instead of \tracingall and using \traceoff after the command you are interested in.

mickep

6:10 PM

@JosephWright I just came across the article. I know nothing about how or why it ended up there.

@JosephWright Another recent nice article is this one, on the fiziko MetaPost module. It could perhaps also fit in TUGboat (@barbarabeeton, I'm pinging you, since @JosephWright did).

Paulo Cereda

@mickep quack (I like to ping people too)

mickep

@PauloCereda Oh, hi.

Paulo Cereda

@mickep (")>/

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